/*
 * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.engine.impl.bpmn.parser.handler;

import org.activiti.bpmn.model.BaseElement;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.bpmn.model.ErrorEventDefinition;
import org.activiti.bpmn.model.EventDefinition;
import org.activiti.bpmn.model.EventSubProcess;
import org.activiti.bpmn.model.Message;
import org.activiti.bpmn.model.MessageEventDefinition;
import org.activiti.bpmn.model.StartEvent;
import org.activiti.engine.impl.bpmn.parser.BpmnParse;
import org.activiti.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.activiti.engine.impl.util.CollectionUtil;
import org.apache.commons.lang3.StringUtils;

/**


 */
public class StartEventParseHandler extends AbstractActivityBpmnParseHandler<StartEvent> {

    @Override
    public Class<? extends BaseElement> getHandledType() {
        return StartEvent.class;
    }

    @Override
    protected void executeParse(BpmnParse bpmnParse, StartEvent element) {
        if (element.getSubProcess() != null && element.getSubProcess() instanceof EventSubProcess) {
            if (CollectionUtil.isNotEmpty(element.getEventDefinitions())) {
                EventDefinition eventDefinition = element.getEventDefinitions().get(0);
                if (eventDefinition instanceof MessageEventDefinition) {
                    MessageEventDefinition messageDefinition = (MessageEventDefinition) eventDefinition;
                    BpmnModel bpmnModel = bpmnParse.getBpmnModel();
                    String messageRef = messageDefinition.getMessageRef();
                    if (bpmnModel.containsMessageId(messageRef)) {
                        Message message = bpmnModel.getMessage(messageRef);
                        messageDefinition.setMessageRef(message.getName());
                        messageDefinition.setExtensionElements(message.getExtensionElements());
                    }
                    element.setBehavior(
                        bpmnParse
                            .getActivityBehaviorFactory()
                            .createEventSubProcessMessageStartEventActivityBehavior(element, messageDefinition)
                    );
                } else if (eventDefinition instanceof ErrorEventDefinition) {
                    element.setBehavior(
                        bpmnParse
                            .getActivityBehaviorFactory()
                            .createEventSubProcessErrorStartEventActivityBehavior(element)
                    );
                }
            }
        } else if (CollectionUtil.isEmpty(element.getEventDefinitions())) {
            element.setBehavior(bpmnParse.getActivityBehaviorFactory().createNoneStartEventActivityBehavior(element));
        }

        if (
            element.getSubProcess() == null &&
            (CollectionUtil.isEmpty(element.getEventDefinitions()) ||
                bpmnParse.getCurrentProcess().getInitialFlowElement() == null)
        ) {
            bpmnParse.getCurrentProcess().setInitialFlowElement(element);
        }

        checkStartFormKey(bpmnParse.getCurrentProcessDefinition(), element);
    }

    private void checkStartFormKey(ProcessDefinitionEntity processDefinition, StartEvent startEvent) {
        if (StringUtils.isNotEmpty(startEvent.getFormKey())) {
            processDefinition.setStartFormKey(true);
        }
    }
}
